Furnace is On but No Heat

If you have your furnace turned out but aren’t getting warm air through the vents, there are a few issues that could be the cause. Use this list to troubleshoot what’s wrong with your furnace and maybe even get it fixed yourself!

Check the Thermostat

It might seem obvious to check the thermostat, but it’s something that’s easily overlooked. Begin by checking that your thermostat is set to heat and set to automatically turn on. Next, try replacing your thermostat batteries.

If the furnace starts to work, celebrate that this was a simple fix!

Inspect the Filter

If the thermostat doesn’t resolve the problem, move on to the furnace filter. Remove the filter and inspect it. If it’s dirty, replace it with a new filter. You should inspect your furnace filter at least once a month. A clogged filter can prevent good airflow in the furnace and prevent warm air from making it to the vents. This can even lead to damaged parts within the furnace as it keeps running without actually heating your home.

If the filter is clean, put it back in and move on to the next step.

Fuel Interruption

If your furnace isn’t getting the fuel it needs, it won’t be able to heat your home. Check the main gas line valve for your home to make sure it’s turned on. Then, contact your gas company to make sure there isn’t a service interruption in the area. Something as simple as a billing mistake could lead to your heat is turned off, but it’s an easy fix once you contact the gas company.

If your home is heated with propane, check the tank to see what your propane level is. If there’s been a sudden drop in your propane levels, there could be an issue with the tank itself.

Ignition System Issues

If nothing else has fixed the problem, the ignition system of the furnace could be to blame. Some furnaces have pilot lights, while others have an electric ignition system. Read the instruction panel on your furnace to learn how to reignite the furnace manually.

If manual reignition doesn’t work, stop trying and contact an HVAC expert. A small part in your furnace could be bad, the vents could be clogged, and a myriad of other potential issues. These types of issues are too complex to fix yourself. Attempting a DIY job could leave your furnace worse off than when you started.

To prevent furnace issues in the future, schedule regular furnace maintenance with an HVAC technician once a year. Contact High-Efficiency today to schedule your service appointment! From routine maintenance to emergency repairs, our technicians are ready to handle any furnace issue you have.